1 /*****************************************************************************
2 * vlc.c: the VLC player
3 *****************************************************************************
4 * Copyright (C) 1998-2008 the VideoLAN team
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@videolan.org>
10 * Derk-Jan Hartman <hartman at videolan dot org>
11 * Lots of other people, see the libvlc AUTHORS file
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
26 *****************************************************************************/
47 extern void LocaleFree (const char *);
48 extern char *FromLocale (const char *);
49 extern void vlc_enable_override (void);
52 static void dummy_handler (int signum)
58 static bool signal_ignored (int signum)
62 if (sigaction (signum, NULL, &sa))
64 return ((sa.sa_flags & SA_SIGINFO)
65 ? (void *)sa.sa_sigaction : (void *)sa.sa_handler) == SIG_IGN;
68 static void vlc_kill (void *data)
72 pthread_kill (*ps, SIGTERM);
75 static void exit_timeout (int signum)
78 signal (SIGINT, SIG_DFL);
81 /*****************************************************************************
82 * main: parse command line, start interface and spawn threads.
83 *****************************************************************************/
84 int main( int i_argc, const char *ppsz_argv[] )
86 /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even
87 * if it is blocked in all thread.
88 * Note: this is NOT an excuse for not protecting against SIGPIPE. If
89 * LibVLC runs outside of VLC, we cannot rely on this code snippet. */
90 signal (SIGPIPE, SIG_IGN);
91 /* Restore SIGCHLD in case our parent process ignores it. */
92 signal (SIGCHLD, SIG_DFL);
95 /* Activate malloc checking routines to detect heap corruptions. */
96 setenv ("MALLOC_CHECK_", "2", 1);
98 /* Disable the ugly Gnome crash dialog so that we properly segfault */
99 setenv ("GNOME_DISABLE_CRASH_DIALOG", "1", 1);
103 setenv ("VLC_PLUGIN_PATH", TOP_BUILDDIR"/modules", 1);
106 /* Clear the X.Org startup notification ID. Otherwise the UI might try to
107 * change the environment while the process is multi-threaded. That could
108 * crash. Screw you X.Org. Next time write a thread-safe specification. */
109 unsetenv ("DESKTOP_STARTUP_ID");
111 #ifndef ALLOW_RUN_AS_ROOT
114 fprintf (stderr, "VLC is not supposed to be run as root. Sorry.\n"
115 "If you need to use real-time priorities and/or privileged TCP ports\n"
116 "you can use %s-wrapper (make sure it is Set-UID root and\n"
117 "cannot be run by non-trusted users first).\n", ppsz_argv[0]);
122 setlocale (LC_ALL, "");
124 if (isatty (STDERR_FILENO))
125 /* This message clutters error logs. It is print it only on a TTY.
126 * Forunately, LibVLC prints version infos with -vv anyhow. */
127 fprintf (stderr, "VLC media player %s (revision %s)\n",
128 libvlc_get_version(), libvlc_get_changeset());
133 /* VLC uses sigwait() to dequeue interesting signals.
134 * For this to work, those signals must be blocked in all threads,
135 * including the thread calling sigwait() (see the man page for details).
137 * There are two advantages to sigwait() over traditional signal handlers:
138 * - delivery is synchronous: no need to worry about async-safety,
139 * - EINTR is not generated: other threads need not handle that error.
140 * That being said, some LibVLC programs do not use sigwait(). Therefore
141 * EINTR must still be handled cleanly, notably from poll() calls.
143 * Signals that request a clean shutdown, and force an unclean shutdown
144 * if they are triggered again 2+ seconds later.
145 * We have to handle SIGTERM cleanly because of daemon mode. */
146 sigaddset (&set, SIGINT);
147 sigaddset (&set, SIGHUP);
148 sigaddset (&set, SIGQUIT);
149 sigaddset (&set, SIGTERM);
151 /* SIGPIPE can happen and would crash the process. On modern systems,
152 * the MSG_NOSIGNAL flag protects socket write operations against SIGPIPE.
153 * But we still need to block SIGPIPE when:
154 * - writing to pipes,
155 * - using write() instead of send() for code not specific to sockets.
156 * LibVLC code assumes that SIGPIPE is blocked. Other LibVLC applications
157 * shall block it (or handle it somehow) too.
159 sigaddset (&set, SIGPIPE);
161 /* SIGCHLD must be dequeued to clean up zombie child processes.
162 * Furthermore the handler must not be set to SIG_IGN (see above).
163 * We cannot pragmatically handle EINTR, short reads and short writes
164 * in every code paths (including underlying libraries). So we just
165 * block SIGCHLD in all threads, and dequeue it below. */
166 sigaddset (&set, SIGCHLD);
169 sigaddset (&set, SIGRTMIN);
171 struct sigaction act = { .sa_handler = dummy_handler, };
172 sigaction (SIGRTMIN, &act, NULL);
175 /* Block all these signals */
176 pthread_sigmask (SIG_SETMASK, &set, NULL);
178 /* Note that FromLocale() can be used before libvlc is initialized */
179 const char *argv[i_argc + 3];
182 argv[argc++] = "--no-ignore-config";
183 argv[argc++] = "--media-library";
185 argv[argc++] = FromLocale ("--data-path="TOP_SRCDIR"/share");
190 /* When VLC.app is run by double clicking in Mac OS X, the 2nd arg
191 * is the PSN - process serial number (a unique PID-ish thingie)
192 * still ok for real Darwin & when run from command line
193 * for example -psn_0_9306113 */
194 if(i_argc >= 2 && !strncmp( ppsz_argv[1] , "-psn" , 4 ))
197 for (; i < i_argc; i++)
198 if ((argv[argc++] = FromLocale (ppsz_argv[i])) == NULL)
202 vlc_enable_override ();
204 /* Initialize libvlc */
205 libvlc_instance_t *vlc = libvlc_new (argc, argv);
209 libvlc_set_user_agent (vlc, "VLC media player", "VLC/"PACKAGE_VERSION);
211 #if !defined (HAVE_MAEMO) && !defined __APPLE__
212 libvlc_add_intf (vlc, "globalhotkeys,none");
214 if (libvlc_add_intf (vlc, NULL))
217 libvlc_playlist_play (vlc, -1, 0, NULL);
219 /* Wait for a termination signal */
220 pthread_t self = pthread_self ();
221 libvlc_set_exit_handler (vlc, vlc_kill, &self);
223 /* Qt4 insists on catching SIGCHLD via signal handler. To work around that,
224 * unblock it after all our child threads are created. */
225 sigdelset (&set, SIGCHLD);
226 pthread_sigmask (SIG_SETMASK, &set, NULL);
228 /* Do not dequeue SIGHUP if it is ignored (nohup) */
229 if (signal_ignored (SIGHUP))
230 sigdelset (&set, SIGHUP);
232 sigdelset (&set, SIGPIPE);
235 sigwait (&set, &signum);
237 /* Restore default signal behaviour after 3 seconds */
239 sigaddset (&set, SIGINT);
240 sigaddset (&set, SIGALRM);
241 signal (SIGINT, SIG_IGN);
242 signal (SIGALRM, exit_timeout);
243 pthread_sigmask (SIG_UNBLOCK, &set, NULL);
249 libvlc_release (vlc);
250 for (int i = 1; i < argc; i++)
251 LocaleFree (argv[i]);